As YouTube videos all but prove, Germans have a really hard time pronouncing "squirrel." After nailing the "squ-," chaos ensues.

In an episode of the British TV show "Top Gear," host Jeremy Clarkson jokingly suggested that asking people to pronounce the word would be a surefire way to identify undercover German spies. "No German, no matter how well they speak English, can say 'squirrel,'" Clarkson asserted.

Exceptions to the rule notwithstanding, why is the name of small, bushy tailed rodents so difficult for the Deutsche? [See video]

Carlos Gussenhoven, a phonologist — a linguist who studies the sounds used in different languages — at Radboud University in the Netherlands, believes the challenge lies in squirrel's syllable structure.

Linguists break words into clusters — groups of consonants that have no intervening vowels. In German, "-rl" is an end cluster, Gussenhoven explained. It comes at the end of a syllable, as in the common German name Karl, rather than forming a syllable of its own. Thus German speakers try to translate the two-syllable English word "squirrel" into the monosyllabic German sound "skwörl " in the same way that "squirm" becomes "skwörm."

But that doesn't sound quite right, and Germans know it. "Dissatisfied with this result, the German speaker tries to produce a real 'R,' of the sort you get in (Rock 'n) Roll, in the end cluster, wreaking havoc," Gussenhoven told Life's Little Mysteries.

He outlined the steps a German should take to pronounce "squirrel," and boy, does it sound like no fun.

"The solution is to say skwö first and then Roll. If the speaker then also manages to avoid saying (1) sh for [s] and (2) [v] for [w], and uses the vowel in the first syllable of getan [German for 'done'] instead of (3)ö in the first syllable and instead of (4) o in the second syllable, and (5) makes the r like the English r and (6) the l like the 'dark' l of English, the result will be quite acceptable," he wrote in an email.

Jessica Williams, a linguist at the University of Illinois in Chicago who studies second language acquisition, said that, based on YouTube, the issue may not be confined to Germans. "I notice that there are plenty of other videos that say the same thing about Arabic and Farsi speakers," she said.